protected override async Task <AuthenticationTicket> AuthenticateCoreAsync()
{
AuthenticationProperties properties = null;
try
{
string state = null;
string code = null;
IReadableStringCollection query = Request.Query;
IList <string> values;
values = query.GetValues("state");
if (values != null && values.Count == 1)
{
state = values[0];
}
properties = Options.StateDataFormat.Unprotect(state);
if (properties == null)
{
return(null);
}
values = query.GetValues("error");
if (values != null && values.Count == 1)
{
return(new AuthenticationTicket(null, properties));
}
values = query.GetValues("code");
if (values != null && values.Count == 1)
{
code = values[0];
}
// OAuth2 10.12 CSRF
if (!ValidateCorrelationId(properties, _logger))
{
return(new AuthenticationTicket(null, properties));
}
string requestPrefix = Request.Scheme + "://" + Request.Host;
string redirectUri = requestPrefix + Request.PathBase + Options.CallbackPath;
var body = new List <KeyValuePair <string, string> >
{
new KeyValuePair <string, string>("grant_type", "authorization_code"),
new KeyValuePair <string, string>("code", code),
new KeyValuePair <string, string>("client_id", Options.ClientId),
new KeyValuePair <string, string>("client_secret", Options.ClientSecret),
new KeyValuePair <string, string>("redirect_uri", redirectUri)
};
// Request the token
var tokenResponse = await _httpClient.PostAsync(TokenEndpoint, new FormUrlEncodedContent(body));
tokenResponse.EnsureSuccessStatusCode();
string content = await tokenResponse.Content.ReadAsStringAsync();
// Deserializes the token response
var response = JsonConvert.DeserializeObject <JObject>(content);
string accessToken = response.Value <string>("access_token");
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
_httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var userResponse = await _httpClient.GetAsync(UserInfoEndpoint);
var userContent = await userResponse.Content.ReadAsStringAsync();
JObject userJson = null;
if (userResponse.IsSuccessStatusCode)
{
userJson = JObject.Parse(userContent);
}
var context = new IntercomAuthenticatedContext(Context, accessToken, userJson);
context.Identity = new ClaimsIdentity(
Options.AuthenticationType,
ClaimsIdentity.DefaultNameClaimType,
ClaimsIdentity.DefaultRoleClaimType);
if (!String.IsNullOrEmpty(context.UserId))
{
context.Identity.AddClaim(
new Claim(ClaimTypes.NameIdentifier, context.UserId, XmlSchemaString, Options.AuthenticationType));
}
if (!String.IsNullOrEmpty(context.Email))
{
context.Identity.AddClaim(
new Claim(ClaimTypes.Email, context.Email, XmlSchemaString, Options.AuthenticationType));
}
context.Properties = properties;
await Options.Provider.Authenticated(context);
return(new AuthenticationTicket(context.Identity, context.Properties));
}
catch (Exception ex)
{
_logger.WriteError("Authentication failed", ex);
return(new AuthenticationTicket(null, properties));
}
}
/// <summary>
/// Invoked whenever Intercom successfully authenticates a user
/// </summary>
/// <param name="context">Contains information about the login session as well as the user <see cref="System.Security.Claims.ClaimsIdentity"/>.</param>
/// <returns>A <see cref="Task"/> representing the completed operation.</returns>
public virtual Task Authenticated(IntercomAuthenticatedContext context)
{
return(OnAuthenticated(context));
}